Luminescent Body For Converting Pump Light

Abstract

A phosphor body ( 1 ) for converting pump light into converted light, the extent of said phosphor body being greater in a direction of extent ( 3 ) than in a direction perpendicular thereto, and which phosphor body is adapted to emit converted light in the direction of extent ( 3 ) as a result of illumination with pump light. The phosphor body ( 1 ) comprises at least two phosphor body subvolumes ( 2 a,b,c,d ), which are configured in such a way that the converted light emitted in each case by said phosphor body subvolumes differs in terms of the spectral properties. The phosphor body subvolumes are arranged successively in a direction oriented perpendicular to the direction of extent.

1 . A phosphor body for converting pump light into converted light, the extent of said phosphor body being greater in a direction of extent than in a direction perpendicular thereto, and which phosphor body is adapted to emit converted light in the direction of extent as a result of illumination with pump light, wherein the phosphor body comprises at least two phosphor body subvolumes, which are configured in such a way that the converted light emitted in each case by said phosphor body subvolumes differs in terms of the spectral properties, which phosphor body subvolumes are arranged successively in a direction oriented perpendicular to the direction of extent. 
     
     
         2 . The phosphor body as claimed in  claim 1 , the extent of said phosphor body in the direction of extent being greater than in two directions perpendicular thereto and to one another. 
     
     
         3 . The phosphor body as claimed in  claim 1 , wherein the phosphor body subvolumes are arranged circumferentially a common axis oriented in the direction of extent. 
     
     
         4 . The phosphor body as claimed in  claim 1 , wherein a phosphor body subvolume extends in the direction of extent over the entire length of the phosphor body. 
     
     
         5 . The phosphor body as claimed in  claim 1 , wherein the phosphor body subvolumes are put together as individual parts which are produced separately from one another, and are connected by a joint. 
     
     
         6 . The phosphor body ( 4 ) as claimed in  claim 5 , wherein a phosphor body subvolume is metal-coated over at least 20% of its length, taken in the direction of extent. 
     
     
         7 . The phosphor body claimed in  claim 6 , wherein the metal coating is at least regionally dichroitic. 
     
     
         8 . An illumination unit comprising a phosphor body as claimed in  claim 1  and a plurality of pump light sources. 
     
     
         9 . The illumination unit as claimed in  claim 8 , wherein a plurality of pump light sources is arranged distributed circumferentially in such a way that different phosphor body subvolumes can be illuminated with different pump light sources. 
     
     
         10 . The illumination unit as claimed in  claim 8 , wherein the phosphor body is configured to rotate about an axis of rotation oriented along the direction of extent, wherein, as a result of the rotation, different sides of the phosphor body and therefore different phosphor body subvolumes can be illuminated with pump light. 
     
     
         11 . (canceled) 
     
     
         12 . The phosphor body as claimed in  claim 5 , wherein a phosphor body subvolume is metal-coated over at least 20% of its length, taken in the direction of extent toward another phosphor body subvolume. 
     
     
         13 . An illumination unit comprising a phosphor body as claimed in  claim 1  and a plurality of laser pump light sources.